We look at the division of 866507 by 77 
We want to divide 866507 by 77.

On to step 1:
77 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 77

Step 2:
The number 77 fits into 86 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 77 away from 86, we end up with 9.
Append the next digit (6) from the dividend to 9 and continue with: 96 / 77

Moving on to step 3:
77 can be fit into 96 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Subtracting 77 from 96 leaves us with 19.
Append the next digit (5) from the dividend to 19 and continue with: 195 / 77

Advancing to step 4:
If we divide 195 by 77, we get 2 and a remainder of 41.
Use 2 as the next digit of our solution. 
Result so far: 112.0
Subtracting 154 from 195 leaves us with 41.
Append the next digit (0) from the dividend to 41 and continue with: 410 / 77

Advancing to step 5:
77 goes into 410 5 times with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 1125.0
Subtract 385 from 410 to get 25.
Include the next digit (7) from the dividend after 25, then repeat: 257 / 77

Advancing to step 6:
77 goes into 257 3 times with a remainder of 26.
Record the quotient 3 as the next digit in the result. 
Result so far: 11253.0
If we take 231 away from 257, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 7:
77 goes into 260 3 times with a remainder of 29.
Put 3 as the next digit of the answer. 
Result so far: 11253.3
The remainder is 29 after subtracting 231 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 8:
The number 77 fits into 290 3 times, leaving a remainder of 59.
Write down 3 as next digit of the result. 
Result so far: 11253.33
If we take 231 away from 290, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

In conclusion, the division gives 11253.33 with a balance of 0.059.